JP2016163854A - Vibration indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration indicator which can quickly attenuate unnecessary vibration after the indication of vibration.SOLUTION: A vibration panel 20 being a vibration part which indicates vibration has: a voice coil motor 100 as a vibration generation part; a box body 30 for supporting the vibration panel 20; a support part 40 which is interposed between the vibration panel 20 and the box body 30, and compressed by a prescribed force; a damper 50 which is interposed between the vibration panel 20 and the box body 30 in parallel with the support part 40, and imparts a brake action to the vibration of the vibration panel 20; and a spring 60 as a pressurization part for imparting prescribed forces to the support parts 40 and the damper 50, and imparts compression forces to the support part 40 and the damper 50 between the vibration panel 20 and the box body 30. A natural length Zof the support part 40 is set at a value which is longer than a natural length Zof the damper 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration presenting apparatus, and more particularly to a vibration presenting apparatus including a damper.

  As a conventional technique, a touch panel that includes a display panel that displays an image, receives a touch operation by a user on the display panel, outputs a touch position, a vibrator, an edge detection unit that detects an edge in the image, and a touch It is determined whether or not the position corresponds to the position of the detected edge. If the position is a corresponding position, the vibrator is controlled to vibrate. If the position is not a corresponding position, vibration is caused to the vibrator. There is known a portable terminal device including a control unit that controls to stop the operation (see, for example, Patent Document 1).

  In this portable terminal device, the vibrator vibrates when the contact position on the touch panel which is a vibration panel and the position of the edge of the image correspond to each other, so that the user can experience the shape of the image. Has been.

JP 2013-206019 A

  However, it is better for the tactile sensation generated by the vibration of the touch panel to attenuate the residual vibration in a short time after the touch panel is vibrated. For example, when the touch panel is supported by a support unit, the conventional mobile terminal device is preferably a soft support unit in order to easily vibrate, and a hard support unit in order to attenuate vibration in a short time. However, there is a problem that both are in a trade-off relationship and it is difficult to achieve both.

  Accordingly, an object of the present invention is to provide a vibration presenting apparatus that can quickly attenuate unnecessary vibration after vibration presentation.

[1] In order to achieve the above object, the present invention provides a vibration unit that presents vibration, a vibration generation unit that applies vibration to the vibration unit, a housing that supports the vibration unit, and the vibration unit. A support part interposed between the casings and compressed by a predetermined force, and a support part interposed between the vibration part and the casing in parallel with the support part to impart a braking action to the vibration of the vibration part. And a pressing part that applies a predetermined force to the support part and the damper, and applies a compressive force to the support part and the damper between the vibration part and the casing, The vibration presenting device is characterized in that the natural length of the support portion is set to a value larger than the natural length of the damper.

[2] The vibration presenting device according to [1], wherein the vibration generating unit applies vibration exceeding a natural length of the damper to the vibrating unit.

[3] The vibration presenting device according to [1] or [2], wherein the damper is not fixed to at least one of the vibration unit or the housing. .

[4] Further, from the above [1] to [3], a coil is mounted on the vibration part, a magnetic circuit is mounted on the casing, and the vibration part is vibrated by energizing the coil. ] The vibration presentation apparatus described in any one of the above.

  According to the present invention, unnecessary vibration after vibration presentation can be quickly damped.

FIG. 1A is a front view of the vibration presenting apparatus according to the first embodiment of the present invention, and FIG. 1B is a top view of the vibration presenting apparatus viewed from the direction A in FIG. It is a top view. FIG. 2 shows each state in the order of the assembly process of the vibration presenting device. FIG. 2 (a) shows a state where the spring is not attached, and FIG. 2 (b) shows a state where the spring is being attached. FIG. 2 (c) is a diagram showing an assembled state in which a spring is mounted. FIG. 3 is a block diagram showing a control block of the vibration presenting apparatus according to the present embodiment. 4A shows signal waveforms of the signals V _S , Vd, and Vc shown in FIG. 3, FIG. 4B shows vibration waveforms, and S ₁ shows an amplitude waveform when a braking action is performed by a damper. S ₂ represents the amplitude waveform of when there is no braking action by the damper. FIG. 5 is a front view of a vibration presenting apparatus according to the second embodiment of the present invention. FIG. 6 is a front view of a vibration presenting apparatus according to the third embodiment of the present invention.

(First embodiment of the present invention)
The vibration presentation device 10 according to the first exemplary embodiment of the present invention includes a vibration panel 20 that is a vibration unit that presents vibration, a voice coil motor 100 as a vibration generation unit, and a casing that supports the vibration panel 20. 30, a support part 40 interposed between the vibration panel 20 and the housing 30 and compressed by a predetermined force, and a support part 40 interposed between the vibration panel 20 and the housing 30 in parallel with the vibration panel. A predetermined force is applied to the damper 50 for applying a braking action to the vibration of the 20 and the support 40 and the damper 50, and a compressive force is applied to the support 40 and the damper 50 between the vibration panel 20 and the housing 30. And a natural length Z ₂ of the support portion 40 is set to a value larger than the natural length Z ₁ of the damper 50.

In the above configuration, the damper 50 is configured not to be fixed to at least one of the vibration panel 20 and the housing 30, so that vibration exceeding the natural length Z ₁ of the damper 50 is applied to the vibration panel 20. The damper 50 does not contribute to vibration damping. In other words, the damper 50 has a damping action that is different in the compression direction and the extension direction, and has an asymmetric damping characteristic. This makes it possible to suppress residual vibration while suppressing an increase in cost and size of the vibration presenting apparatus.

(Vibration panel 20)
FIG. 1A is a front view of the vibration presenting apparatus according to the first embodiment of the present invention, and FIG. 1B is a top view of the vibration presenting apparatus viewed from the direction A in FIG. It is a top view. The vibration panel 20 can use various materials, such as metal materials, such as aluminum, and resin, for example.

  As shown in FIG. 1 and the like, the vibration panel 20 is a plate-like body, and a touch sensor is attached to the upper surface 20a, for example, so that a touch detection device can be obtained. The vibration panel 20 can present vibration by being driven by a voice coil motor 100 as a drive source. For example, when the vibration panel 20 as the touch detection device is touched, the operator is notified of the touch by vibrating the vibration panel 20 in, for example, the B direction shown in FIG. In addition, tactile sensation can be presented by vibrating the vibration panel 20 in accordance with various operations.

  An attachment portion 22 is formed on the lower surface 20 b of the vibration panel 20, and the coil 110 of the voice coil motor 100 is attached and fixed to the attachment portion 22. As shown in FIGS. 1A and 1B, a locking hole 20 c for locking the hook portion of the spring 60 is formed in the corner portion 21 of the vibration panel 20. Further, the lower surface 20b of the vibration panel 20 is a surface with which the end portions of the support portion 40 and the damper 50 abut.

(Case 30)
As shown in FIG. 1 and the like, the housing 30 is a plate-like body, and for example, various materials such as a metal material such as aluminum and a resin can be used. Corresponding to the vibration panel 20, a locking hole 30 b for locking the hook portion of the spring 60 is formed in the corner portion 31. Further, the upper portion 30 a of the housing 30 is a surface with which the end portions of the support portion 40 and the damper 50 abut.

(Supporting part 40)
The support part 40 is formed of an elastic member such as silicon rubber. As shown in FIGS. 1A and 1B, the support portion 40 has a rectangular frame shape, but is not limited thereto. Any shape that can support the vibration panel 20 interposed between the vibration panel 20 and the housing 30 may be used. As shown in FIG. 2 (a), the thickness of the support portion 40 (length in a direction which is interposed between the vibrating panel 20 and the housing 30) is Z ₂ in the natural length.

(Damper 50)
The damper 50 is formed of an elastic member such as rubber or synthetic resin. For example, any material having viscosity and elasticity and exhibiting a braking action against vibration such as butyl rubber may be used. Various elastic members marketed as viscoelastic dampers can be used.

The damper 50 has a rectangular frame shape as shown in FIGS. 1A and 1B, but is not limited thereto. Any structure that intervenes between the vibration panel 20 and the housing 30 and imparts a braking action to the vibration of the vibration panel 20 may be used. As shown in FIG. 2 (a), the thickness of the damper 50 (the length in a direction which is interposed between the vibrating panel 20 and the housing 30) is Z ₁ in the natural length.

(Spring 60)
The spring 60 functions as a pressure unit that applies a compressive force to the support unit 40 and the damper 50. In the present embodiment, as shown in FIG. 1A and the like, the spring 60 uses a tension coil spring. As shown in FIG. 2B, the spring 60 is composed of a coil portion formed by a tensile force and hook portions 60a and 60b formed at both ends thereof. The hook portions 60 a and 60 b are hooked and locked in the locking hole 20 c of the vibration panel 20 and the locking hole 30 b of the housing 30, respectively. Thereby, a tensile force is generated between the vibration panel 20 and the housing 30. Therefore, a compressive force can be applied to the support portion 40 and the damper 50 interposed between the vibration panel 20 and the housing 30.

(Voice coil motor 100)
A voice coil motor 100 as a vibration generating unit includes a coil 110 and a magnetic circuit 120 as shown in FIGS. The coil 110 is attached and fixed to the vibration panel 20 side, and the magnetic circuit 120 is mounted and fixed on the upper portion 30 a of the housing 30.

  The coil 110 is formed by winding a magnet wire such as an enamel wire in a coil shape a plurality of times. When the coil 110 is energized, it is driven by the Lorentz force received from the magnetic field H generated by the magnetic circuit 120 according to the Fleming left-hand rule, and becomes a vibration generating source.

  The magnetic circuit 120 includes a yoke (center yoke 122, relay yoke 124, side yoke 126) and a magnet (permanent magnet) 130. As shown in FIGS. 1A, 1B, etc., the yoke (center yoke 122, relay yoke 124, side yoke 126) is formed in a cylindrical or disk shape, for example, a soft magnetic material such as soft iron or silicon steel. It is formed by. The magnet (permanent magnet) 130 is attached to the side yoke 126 and generates a magnetic field H between the magnet 130 and the center yoke 122.

  The coil 110 is disposed between the magnet 130 and the center yoke 122, and is driven in the B direction shown in FIG. If the energization to the coil 110 is alternating current, the vibration will reciprocate in the B direction. Thereby, the vibration panel 20 to which the coil 110 is attached and fixed can vibrate in the B direction and present vibration. In addition, the vibration presentation to directions other than the B direction shown to Fig.1 (a) is also possible by the arrangement | positioning relationship between the coil 110 and the magnetic circuit 120. FIG.

(Assembly of vibration presentation device 10)
FIG. 2 shows each state in the order of the assembly process of the vibration presenting device. FIG. 2 (a) shows a state where the spring is not attached, and FIG. FIG. 2 (c) is a diagram showing an assembled state in which a spring is mounted.

As shown in FIG. 2A, first, the support portion 40 and the damper 50 are disposed at predetermined positions on the upper portion 30a of the casing 30 on which the voice coil motor 100 is placed and fixed. In this state, the support portion 40 has a natural length Z ₂ and the damper 50 has a natural length Z ₁ . That is, in the state illustrated in FIG. 2A, the upper end portion 40 a of the support portion 40 and the lower surface 20 b of the vibration panel 20 abut, but the support portion 40 is not compressed, and the lower surface 20 b of the vibration panel 20 and the housing 30 are not compressed. the distance between the upper 30a indicates the same state as natural length Z ₂ of the support portion 40.

  The lower end portion 40b of the support portion 40 and the lower end portion 50b of the damper 50 may be fixed in a state in contact with the upper portion 30a of the housing 30 or by adhesion.

  In this state, the vibration panel 20 to which the coil 110 is attached and fixed is aligned with a predetermined position so that the upper end portion 40a of the support portion 40 and the lower surface 20b of the vibration panel 20 are in contact with each other. At this time, the spring 60 is not yet mounted, and the upper end portion 50a of the damper 50 and the lower surface 20b of the vibration panel 20 are not in contact with each other.

  As shown in FIG. 2 (b), the hook portions 60 a and 60 b of the spring 60 are hooked and locked in the locking holes 20 c of the vibration panel 20 and the locking holes 30 b of the housing 30, respectively. Thereby, the support part 40 and the damper 50 which are interposed between the vibration panel 20 and the housing | casing 30 contact, and receive a compressive force.

The upper end portion 40a of the support portion 40 and the upper end portion 50a of the damper 50 may be fixed by being in contact with the lower surface 20b of the vibration panel 20, or by bonding or the like. However, the damper 50 is configured not to be fixed to at least one of the vibration panel 20 and the housing 30. That is, the upper end portion 50a of the damper 50 is in a state where it is in contact with the lower surface 20b of the vibration panel 20 and is not bonded, or the lower end portion 50b of the damper 50 is in contact with the upper portion 30a of the housing 30. It is set as the structure which will be in the state which has not adhere | attached. Thus, the amplitude of the vibration panel 20 since the damper function in a region exceeding the natural length Z ₁ of the damper 50 does not act, it is possible to small vibration presenting apparatus of inhibiting vibration effect for the original vibration presenting .

In the state shown in FIG. 2B, the upper end portion 50a of the damper 50 and the lower surface 20b of the vibration panel 20 abut, but only the support portion 40 is compressed, and the lower surface 20b of the vibration panel 20 and the upper portion 30a of the housing 30 are in contact. distance between indicates the same state as natural length Z ₁ of the damper 50.

State shown in FIG. 2 (c), is compressed support portion 40 and the damper 50, the completion assembly distance between the upper 30a of the lower surface 20b and the casing 30 of the vibration panel 20 becomes a predetermined distance Z ₀ state Is shown.

  The vibration presenting apparatus 10 is vibrated by the voice coil motor 100 when the coil 110 is energized in the above-described assembly completion state.

(Vibration presentation operation of the vibration presentation device 10)
FIG. 3 is a block diagram showing a control block of the vibration presenting apparatus according to the present embodiment. 4A shows the signal waveforms of the signals V _S , Vd, and Vc shown in FIG. 3, FIG. 4B shows the vibration waveforms, and S ₁ shows the amplitude when the braking action is performed by the damper. waveform, S ₂ represents the amplitude waveform of when there is no braking action by the damper.

As shown in FIG. 3, the vibration on signal V _S is input to the control unit 200, and the drive signal Vd (for example, an AC signal such as a pulse signal) is output to the drive circuit 210. The coil 110 is energized by the coil drive signal Vc that has been amplified by the drive circuit 210. A Lorentz force is generated in the coil 110 by the magnetic field H generated between the magnet 130 and the center yoke 122 and the coil current.

  As shown in FIG. 4A, when the coil 110 is pulse-driven, it vibrates in the direction B shown in FIG. 1A, and the vibration panel 20 as the vibration unit vibrates. The vibration panel 20 vibrates by pulse driving up to times t1, t2, t3, and t4, and a vibration waveform as shown in FIG.

4 (b), the vibration waveform S ₂ is the amplitude waveform of when there is no braking action by the damper. Since the present embodiment includes the damper 50, the amplitude waveform is a braking action by the damper. That is, after completion of excitation of the time t4, the remaining vibration is quickly attenuated as vibration waveform S _1. When the residual vibration after the vibration presentation is quickly attenuated, the touch of the tactile presentation can be improved.

In FIG. 4B, the region A ₁ until the support portion 40 compressed to the distance Z ₀ extends to the natural length Z ₁ of the damper 50, and the support portion 40 and the damper 50 are compressed. The entire area Da in the direction of the direction is the damper effective range.

On the other hand, in the region A ₂ extending beyond the natural length Z ₁ of the damper 50, the damper does not act in the direction in which the damper 50 extends, and the damper acts in the direction in which the damper 50 is compressed. In other words, the damper 50 has a damping action that is different in the compression direction and the extension direction, and has an asymmetric damping characteristic.

(Second embodiment of the present invention)
FIG. 5 is a front view of a vibration presenting apparatus according to the second embodiment of the present invention. In the second embodiment, the tension coil spring used in the first embodiment is a compression coil spring. Since the other configuration is the same as that of the first embodiment, the different configuration will be described below.

(Spring 65)
The spring 65 functions as a pressure unit that applies a compressive force to the support unit 40 and the damper 50. In the present embodiment, as shown in FIG. 5, the spring 65 uses a compression coil spring. As shown in FIG. 5, the spring 65 is composed of a compression coil portion. In this compression coil portion, the upper end portion 65 a abuts on the corner portion 36 of the housing 30, and the lower end portion 65 b abuts on the corner portion 26 of the vibration panel 20 in a compressed state. Thereby, a compressive force is applied to the support portion 40 and the damper 50 interposed between the vibration panel 20 and the housing 30.

(Third embodiment of the present invention)
FIG. 6 is a front view of a vibration presenting apparatus according to the third embodiment of the present invention. In the third embodiment, a piezoelectric actuator 150 is used instead of the voice coil motor 100 as the vibration generating unit used in the first embodiment. Since the other configuration is the same as that of the first embodiment, the different configuration will be described below.

  The piezoelectric actuator 150 is, for example, a morph-type piezoelectric element that includes a plate and a piezoelectric element, and is fixed to the lower surface 20 b of the vibration panel 20. This morph-type piezoelectric element is a piezoelectric element having a structure in which a layered or plate-shaped piezoelectric element is bent. The plate is formed using, for example, a conductive metal material such as aluminum, nickel, copper, and iron, an alloy material containing them, or an alloy material such as stainless steel.

  Examples of the material of the piezoelectric element include lithium niobate, barium titanate, lead titanate, lead zirconate titanate (PZT), lead metaniobate, polyvinylidene fluoride (PVDF), polylactic acid, and the like. This piezoelectric element is, for example, a single-layer unimorph type in which a film formed using the above material is formed on one surface of a metal plate, and a stacked film formed by stacking a film formed using the above material. This is a unimorph type piezoelectric element.

  Since the piezoelectric actuator 150 is deformed by tension or compression when a voltage is applied, the piezoelectric actuator 150 can be vibrated by performing pulse driving as shown in FIG. 4, and the vibration panel 20 can be presented with vibration.

(Effect of the embodiment of the present invention)
The configuration as described above has the following effects.
(1) In the first embodiment, the damper 50 is provided. The damper has a damping characteristic in which the damping action differs between the compression direction and the extension direction of the damper 50 and has an asymmetric damping characteristic. Therefore, in the large vibration region (region A ₂ ) as shown in FIG. 4B, the excitation action is not easily inhibited in the excitation operation. On the other hand, in the small vibration region (region A ₁ ) as shown in FIG. 4B, the braking action by the damper works in the entire region, so that the residual vibration is attenuated quickly after the end of excitation. That is, the residual vibration after the vibration presentation is quickly attenuated, so that the touch of the tactile presentation can be improved.
(2) In the second embodiment, since the compression coil spring is used in addition to the effect of the first embodiment, the hooking process does not occur in the assembling process, and the assembling efficiency is improved. There is.
(3) In the third embodiment, in addition to the effects of the first embodiment, the piezoelectric actuator 150 can be used as a vibration generation source by pasting and fixing it to the lower surface 20b of the vibration panel 20. As a result, the structure can be simplified and the apparatus can be thinned.

  Although the embodiment of the present invention has been described above, this embodiment is merely an example, and does not limit the invention according to the claims. The novel embodiment can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the gist of the present invention. In addition, not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention. Further, the embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Vibration presentation apparatus 20 ... Vibration panel 20a ... Upper surface 20b ... Lower surface 20c ... Locking hole 21 ... Corner part 22 ... Mounting part 26 ... Corner part 30 ... Case 30a ... Upper part 30b ... Locking hole 31 ... Corner part 36 ... Corner 40 ... support 40a ... upper end 40b ... lower end 50 ... damper 50a ... upper end 50b ... lower end 60 ... spring 60a ... hook portion 65 ... spring 65a ... upper end 65b ... lower end 100 ... voice coil motor 110 ... Coil 120 ... Magnetic circuit 122 ... Center yoke 124 ... Relay yoke 126 ... Side yoke 130 ... Magnet 150 ... Piezoelectric actuator 200 ... Control unit 210 ... Drive circuit

Claims (4)

A vibrating part presenting vibrations;
A vibration generating unit for applying vibration to the vibrating unit;
A housing that supports the vibrating section;
A support part interposed between the vibrating part and the housing and compressed by a predetermined force;
A damper interposed between the vibration part and the housing in parallel with the support part, and applying a braking action to the vibration of the vibration part;
A pressure unit that applies a predetermined force to the support unit and the damper, and applies a compressive force to the support unit and the damper between the vibration unit and the housing;
The vibration presenting apparatus according to claim 1, wherein a natural length of the support portion is set to a value larger than a natural length of the damper.   The vibration presenting apparatus according to claim 1, wherein the vibration generation unit imparts vibrations exceeding a natural length of the damper to the vibration unit.   The vibration presenting apparatus according to claim 1, wherein the damper is not fixed to at least one of the vibration unit and the housing.   4. The vibration unit according to claim 1, wherein a coil is mounted on the vibration unit, a magnetic circuit is mounted on the casing, and the vibration unit is vibrated by energizing the coil. 5. Vibration presentation device.

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